On some results of third-grade non-Newtonian fluid flow between two parallel plates Kamran Ayub, M. Yaqub Khan, Muhammad Ashraf, Jamshad Ahmad and Qazi Mahmood-Ul-Hassan Eur. Phys. J. Plus, 132 12 (2017) 552 Published online: 29 December 2017 DOI: 10.1140/epjp/i2017-11821-1